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owenclave / app/src/main/java/io/nekohasekai/sagernet/fmt/gson/GsonConverters.java
/******************************************************************************
* *
* Copyright (C) 2021 by nekohasekai *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see . *
* *
******************************************************************************/
package io.nekohasekai.sagernet.fmt.gson;
import androidx.room.TypeConverter;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import kotlin.collections.CollectionsKt;
import kotlin.collections.SetsKt;
public class GsonConverters {
@TypeConverter
public static String toJson(Object value) {
if (value instanceof Collection) {
if (((Collection) value).isEmpty()) return "";
}
return GsonsKt.getGson().toJson(value);
}
@TypeConverter
public static List toList(String value) {
if (value == null || value.isBlank()) return CollectionsKt.listOf();
return GsonsKt.getGson().fromJson(value, List.class);
}
@TypeConverter
public static Set toSet(String value) {
if (value == null || value.isBlank()) return SetsKt.setOf();
return GsonsKt.getGson().fromJson(value, Set.class);
}
}